PIC32MX340F256H-80V/MR - 80MHz 32-bit MCU 256KB Flash | Microchip
MPN: PIC32MX340F256H-80V/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.95 | $7.95 |
| 10 | $7.16 | $71.60 |
| 100 | $6.36 | $636.00 |
| 500 | $5.73 | $2,865.00 |
| 1,000 | $5.09 | $5,090.00 |
PIC32MX340F256H-80V/MR Overview
A PIC32MX MCU belongs to the 32-bit microcontroller category, which sits within the broader embedded computing hierarchy: microcontroller -> embedded processor -> system-on-chip -> semiconductor. The PIC32MX3XX/4XX family uses the MIPS32 M4K core to deliver significantly higher computational throughput than 8-bit or 16-bit predecessors while preserving the PIC peripheral ecosystem and MPLAB X IDE toolchain, enabling easy migration from older PIC24 or PIC32 architectures.
Key features include deterministic interrupt response, hardware Multiply/Divide, 16-bit parallel master port for external memory expansion, two I2C, two SPI, and five UART/PPPP interfaces. The integrated 10-bit ADC supports up to 16 channels at 500 ksps, while dedicated DMA channels enable high-throughput peripheral transfers without CPU intervention. The VQFN-64 package provides a compact footprint and enhanced thermal dissipation through its exposed pad.
Designed around the MIPS M4K pipeline with single-cycle multiply, the PIC32MX340 architecture offers 1.56 DMIPS/MHz performance. The 80 MHz maximum core frequency, combined with 5-stage pipeline execution, delivers deterministic real-time behavior suitable for USB stacks, sensor fusion, and small graphics rendering. Peripheral pin select (PPS) simplifies PCB routing by allowing flexible I/O assignment.
Typical applications include industrial control panels, USB peripherals (HID, CDC, MSD class devices), consumer audio equipment, medical instrumentation, and embedded HMI displays. Its combination of USB, ADC, and DMA makes it well-suited for data-acquisition and bridge devices. Choose the PIC32MX340F256H-80V/MR for new designs requiring USB connectivity with ample headroom in program memory.
When designing with this device, place decoupling capacitors close to every VDD/VSS pair, follow Microchip's reference USB design (90-ohm differential impedance), and use the exposed pad as the primary ground/thermal path. Always validate USB signal integrity using Microchip's HID or CDC stack example projects.
This page synthesizes distributor pricing from DigiKey and Mouser, drop-in alternative MPNs from the same PIC32MX family, and practical PCB design notes not collected in the manufacturer datasheet.
Drop-in alternatives for PIC32MX340F256H-80V/MR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC32MX340F256H-80V/MR (same form factor and footprint) — differing in ADC, Operating Temperature, USB, DMA Channels, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX340F256HT-80V/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX340F256H-80I/MR
✅ Drop-In✓ In Stock
$4.35 / Unit
View Datasheet →PIC32MX340F256H-80V/PT
✅ Drop-In✓ In Stock
$4.4 / Unit
View Datasheet →PIC32MX450F256H-80V/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX360F256L-80I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX370F256H-80V/MR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX340F256H-80V/MR Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| Core Size | 32-bit Single-Core |
| Maximum CPU Speed | 80 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| RAM Size | 32 KB (32K x 8) |
| Number of I/O Pins | 53 |
| Package / Case | 64-VFQFN Exposed Pad (9x9 mm) |
| Operating Voltage | 2.3 V to 3.6 V |
| ADC | 10-bit, up to 16 channels |
| USB | USB 2.0 FS Device/Host/OTG |
| DMA | Yes |
| Operating Temperature | -40C to +105C |
| Mounting Type | Surface Mount |
| Packaging | Tube (per JLCPCB listing) |
| RoHS Status | Compliant |
PIC32MX340F256H-80V/MR Pin Configuration
| Pin 1 | RP15/RF6 — Remappable I/O / RPC6 |
| Pin 2 | VDD — Core logic supply (2.3V-3.6V) |
| Pin 3 | RP14/RF5 — Remappable I/O |
| Pin 4 | RP13/RF4 — Remappable I/O |
| Pin 5 | RP12/RF3 — Remappable I/O |
| Pin 6 | RP11/RF2 — Remappable I/O |
| Pin 7 | RP10/RF1 — Remappable I/O |
| Pin 8 | RP9/RF0 — Remappable I/O |
| Pin 9 | VSS — Ground reference |
| Pin 10 | RP8/RG9 — Remappable I/O |
| Pin 11 | RP7/RG8 — Remappable I/O |
| Pin 12 | RP6/RG7 — Remappable I/O |
| Pin 13 | RP5/RG6 — Remappable I/O |
| Pin 14 | RP4/RG5 — Remappable I/O |
| Pin 15 | RP3/RG4 — Remappable I/O |
| Pin 16 | RP2/RG3 — Remappable I/O |
| Pin 17 | MCLR — Master Clear / Reset input (active low) |
| Pin 18 | RP1/RG2 — Remappable I/O |
| Pin 19 | VDD — Core logic supply (2.3V-3.6V) |
| Pin 20 | OSC1/CLKI/RC1 — Crystal oscillator input / external clock |
| Pin 21 | OSC2/CLKO/RC2 — Crystal oscillator output |
| Pin 22 | VSS — Ground reference |
| Pin 23 | AN15/C1IN-/CVREF-/CN12/RB15 — Analog input 15 / negative comparator input |
| Pin 24 | AN14/C1IN+/CN11/RB14 — Analog input 14 / positive comparator input |
| Pin 25 | AN13/C2IN-/CN10/RB13 — Analog input 13 / negative comparator input |
| Pin 26 | AN12/C2IN+/CN9/RB12 — Analog input 12 / positive comparator input |
| Pin 27 | AN11/RB11 — Analog input 11 |
| Pin 28 | AN10/RB10 — Analog input 10 |
| Pin 29 | AN9/RB9 — Analog input 9 |
| Pin 30 | AN8/RB8 — Analog input 8 |
| Pin 31 | VDD — Core logic supply (2.3V-3.6V) |
| Pin 32 | VSS — Ground reference |
| Pin 33 | AN7/RB7 — Analog input 7 |
| Pin 34 | AN6/RB6 — Analog input 6 |
| Pin 35 | AN5/RB5 — Analog input 5 |
| Pin 36 | AN4/RB4 — Analog input 4 |
| Pin 37 | AN3/RB3 — Analog input 3 |
| Pin 38 | AN2/RB2 — Analog input 2 |
| Pin 39 | AN1/RB1 — Analog input 1 |
| Pin 40 | AN0/RB0 — Analog input 0 |
| Pin 41 | VDD — Core logic supply (2.3V-3.6V) |
| Pin 42 | VSS — Ground reference |
| Pin 43 | SDA2/RG3 — I2C2 data line (shared with RG3) |
| Pin 44 | SCL2/RG2 — I2C2 clock line (shared with RG2) |
| Pin 45 | D-/RG1 — USB D- data line |
| Pin 46 | D+/RG0 — USB D+ data line |
| Pin 47 | VUSB — USB transceiver supply (3.3V typical) |
| Pin 48 | RPD0/RE8 — Remappable I/O |
| Pin 49 | RPD1/RE9 — Remappable I/O |
| Pin 50 | RPD2/RE0 — Remappable I/O |
| Pin 51 | RPD3/RE1 — Remappable I/O |
| Pin 52 | RPD4/RE2 — Remappable I/O |
| Pin 53 | RPD5/RE3 — Remappable I/O |
| Pin 54 | RPD6/RE4 — Remappable I/O |
| Pin 55 | RPD7/RE5 — Remappable I/O |
| Pin 56 | VSS — Ground reference |
| Pin 57 | VDD — Core logic supply (2.3V-3.6V) |
| Pin 58 | RD15 — Parallel master port data bit |
| Pin 59 | RD14 — Parallel master port data bit |
| Pin 60 | RD13 — Parallel master port data bit |
| Pin 61 | RD12 — Parallel master port data bit |
| Pin 62 | RD11 — Parallel master port data bit |
| Pin 63 | RD10 — Parallel master port data bit |
| Pin 64 | RD9 — Parallel master port data bit |
Typical Applications
PIC32MX340F256H-80V/MR is suitable for 6 applications: Industrial Control Panels, USB Peripherals and HID Devices, Portable Medical Instrumentation, Consumer Audio Equipment, Embedded HMI / Graphical Displays, Data Acquisition Modules.
Industrial Control Panels
The PIC32MX340F256H-80V/MR suits industrial control panels thanks to its 53 GPIO, 16-channel 10-bit ADC, and -40C to +105C operation. The 256 KB Flash holds full Modbus, CANopen, or USB-CDC stacks alongside HMI logic, while the DMA engine drives TFT or character LCD updates without CPU stalls. The 80 MHz MIPS M4K core executes control loops in well under 1 ms, and the integrated USB port enables diagnostics uploads and firmware updates from a host PC.
Recommended
USB Peripherals and HID Devices
The PIC32MX340F256H-80V/MR's integrated USB 2.0 full-speed device/host/OTG controller is the centerpiece of HID, CDC, and MSD peripherals. The 80 MHz MIPS M4K core executes Microchip's free USB stack comfortably, while 256 KB Flash holds class drivers plus application logic. The 32 KB SRAM accommodates USB endpoint buffers plus protocol stacks, and DMA transfers endpoint data to RAM without CPU intervention, ensuring deterministic USB interrupt latency.
Recommended
Portable Medical Instrumentation
The PIC32MX340F256H-80V/MR fits portable medical devices such as glucose meters, pulse oximeters, and handheld diagnostic tools. The 10-bit ADC with 16 input channels handles sensor readout (temperature, optical, impedance), while the DMA engine streams samples to RAM for DSP-based filtering. The 2.3-3.6 V operating range allows direct Li-Ion battery power, and the 64-VQFN exposed pad supports compact PCB layouts typical of wearable medical form factors.
Recommended
Consumer Audio Equipment
The PIC32MX340F256H-80V/MR's 80 MHz MIPS M4K core runs audio decoders, USB audio class drivers, and small DSP routines, making it well-suited for USB speakers, headphone amplifiers, and DJ controllers. The 256 KB Flash stores USB Audio class firmware plus user interface logic, while DMA feeds I2S or SPI to external DACs without CPU load. Its 53 GPIO handle buttons, encoders, and LED rings typical of consumer audio front panels.
Recommended
Embedded HMI / Graphical Displays
The PIC32MX340F256H-80V/MR drives small TFT and OLED HMI displays through its parallel master port (PMP) and SPI interfaces. At 80 MHz, it refreshes QVGA (320x240) panels at acceptable frame rates while running control logic concurrently. DMA streams display buffer updates from Flash to PMP peripheral, freeing the CPU for touch input handling and animation rendering. The 53 GPIO accommodate touch controller, backlight PWM, and user buttons.
Recommended
Data Acquisition Modules
The PIC32MX340F256H-80V/MR serves as the controller in USB-based data acquisition modules, with its 16-channel 10-bit ADC sampling at 500 ksps and DMA streaming samples to RAM. The integrated USB FS port streams captured data to a host PC, while 256 KB Flash holds firmware plus calibration tables. The 32 KB SRAM buffers multi-channel waveform captures, and the 80 MHz MIPS M4K core performs on-the-fly scaling and digital filtering before USB transmission.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX340F256H-80V/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX340F256HT-80V/MR | PIC32MX340F256H-80I/MR | PIC32MX340F256H-80V/PT | PIC32MX450F256H-80V/MR |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-VQFN (9x9 mm) | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | 64-TQFP (10x10 mm) - different | 64-VQFN (9x9 mm) - same |
| Maximum CPU Speed | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB |
| RAM Size | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| USB Version | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Hi-Speed OTG (upgrade) |
| Operating Temperature | -40C to +105C | -40C to +105C | -40C to +85C (narrower) | -40C to +105C | -40C to +105C |
| GPIO Count | 53 | 53 | 53 | 53 | 53 |
Key Differentiators
- Highest temperature grade in the same MR footprint (vs PIC32MX340F256H-80I/MR)
- Compact 9x9 mm VQFN with exposed thermal pad (vs PIC32MX340F256H-80V/PT (64-TQFP))
- Drop-in upgrade path to Hi-Speed USB (vs PIC32MX450F256H-80V/MR)
Design Notes
Place 0.1 uF and 1 uF ceramic decoupling capacitors as close as possible to every VDD/VSS pin pair. For USB operation, add a 10 uF bulk capacitor near the VUSB pin and follow Microchip's USB hardware design guide for proper rail sequencing. Avoid sharing analog and digital supply traces.
The 64-VQFN (9x9 mm) exposed pad must be soldered to a continuous ground plane with thermal vias (typically a 3x3 array of 0.3 mm vias) for both electrical grounding and heat dissipation. This reduces junction-to-ambient thermal resistance from ~40 C/W to under 25 C/W in typical PCB layouts, which is essential when USB and ADC operate continuously.
Route the 90-ohm differential USB pair (D+ / D-) with controlled impedance and matched length within 150 mil. Keep USB traces away from switching nodes and clock oscillators. Place the 27-ohm series termination resistors on D+/D- as close to the MCU pins as possible to suppress reflections.
Do not leave unused GPIO pins floating - configure them as outputs or enable the internal weak pull-ups via firmware. Failure to do so can cause excessive current draw in sleep modes and unpredictable behavior. Also, always configure the JTAG/Trace pins (TMS, TCK, TDI, TDO) to alternate function before debugging to avoid conflicts.
Compliance Information
RoHS and REACH compliance confirmed by Microchip product page; not AEC-Q100 qualified (use PIC32MX automotive variants for that).
